/in/foo.cc: In member function 'void Graph::Read()':
/in/foo.cc:38:22: warning: unused variable 'w' [-Wunused-variable]
   int n, m; FlowType w; Vertex u, v;
                      ^
/in/foo.cc:38:32: warning: unused variable 'u' [-Wunused-variable]
   int n, m; FlowType w; Vertex u, v;
                                ^
/in/foo.cc:38:35: warning: unused variable 'v' [-Wunused-variable]
   int n, m; FlowType w; Vertex u, v;
                                   ^
/in/foo.cc: In member function 'FlowType Graph::MaxFlow()':
/in/foo.cc:104:42: warning: suggest parentheses around assignment used as truth value [-Wparentheses]
    while ( d = ArgumentPath( S, Infinity ) ) Flow += d;
                                          ^